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CVE-2026-74971Information disclosure in the DOM: UI Events & Focus Handling component
- 4.3MediumCVSS base score
- 0.32%Exploitation in 30 daysEPSS · top 74% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Timeline
ID reserved
By mozilla
- 1 day later
· 1 day later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.32% · top 74% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
- unaffected 140.14 – ≤ 140.*
- unaffected 153.1 – ≤ 153.*
- unaffected 154 – ≤ *
- unaffected 140.14 – ≤ 140.*
- unaffected 153.1 – ≤ 153.*
- unaffected 154 – ≤ *
References
References7
- https://bugzilla.mozilla.org/show_bug.cgi?id=2057204 (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-74/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-76/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-77/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-78/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-79/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-80/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-60666 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74971)Record last updated .